Tab index for envelopes and method of making same



0Q. 7, 1930. R. N. LUPFE TAB INDEX FOR BNVELOPES AND METHOD OF MAKING SAIE Filed June 24, 129

mvzwron A'n'ommrg Patented Oct. 7, 1930 UNITED STATES PATENT, OFFICE ROBERT N. LUPFER, OF SPRINGFIELD, OHIO, ASSIGNOR TO THE SPRINGFIELD LEATHER PRODUCTS COMPANY, OF SPRINGFIELD, OHIO, A CORPORATION OF OHIO TAB INDEX FOB ENVELOPES AND METHOD OF MAKING SAME Application filed June 24, 1829. Serial No. 373,153.

This invention relates to envelopes and containers of like character, it particularly relating to index tabs for such articles and the method of forming the same.

The object of my invention is to provide an indeX tab of simple and convenient character for envelopes and the like by means of which envelopes placed in groups or stacks may be readily identified and to also provide a simple and effective method of forming the tabs. 7

In the accompanying drawings:

' Fig. 1 is a perspective view of a group of envelopes in stacked relation shown provided with my improved index tabs.

Fig. 2 is a view in perspective of one end of an envelope before the members thereof have been secured together and prior to the formation of the tab.

Fig. 3 is an elevation of a portion of one end of the envelope showing a tab formed thereon.

This invention is more particularly adapted to that type of envelope which is formed of sheet celluloid or similar material suitable for the reception of cards and the like, the face of which it is desired to expose, and also to envelopes of this kind, the sheets of which are oined or seamed together by an adhesive substance which is applied to an intermediate strip of celluloid or similar material.

Referring to the drawings, 1 and 2 represent two sheets of celluloid or other similar material which form the enclosing walls of an envelope, and 3 represents an intermediate strip, preferably of the same material, which is inserted between those edges of the enclosing walls which are to be joined together after an adhesive substance has been applied to the strip. The liquid substance employed is preferably a solvent of the celluloid or other material forming the envelope or intermediate strip and by employing the intermediate strip the spread of the adhesive liquid is confined to the area. of the strip.

In carrying out my invention, I form the intermediate strip of a width such that it will project beyond the edges of the walls of the envelopes a distance at least equal to together having tabs of different colors as indicated by the lines of shading in Fig. 1.

In Figs. 1 and 3 ofthe drawing, the tabs formed are comparatively short in length, but it will be understood that the intermediate strip may be suitably cut to provide a tab of any desired length.

Having thus described my invention, I

claim:

1. The method of forming a tab upon an envelope of the character described consisting in adhesively joining two adjacent marginal edges of the walls of the envelope and a narrow strip of material interposed between and initially projecting beyond the same, and thereafter removing a portion of the projecting part of said strip to provide an index tab.

2. In an envelope of the character described having a pair of superimposed walls, a narrow strip of material interposed be tween two adjacent marginal edges of said Walls throughout their length and adhesively secured thereto to join said edges of the wall together, and an index tab integrally formed with said interposed strip of material and projecting beyond the edges of said walls.

3. In an envelope of the character described, two sheets of superimposed material forming the walls of the envelope, an intermediate narrow strip of material between two adjacent marginal edges of said Walls and adhesively joined thereto, said strip extending throughout the entire length of said margins, and an integral portion on said in terposed strip of less length than the strip and projecting beyond the edges of said sheets to provide an index tab.

In testimony whereof, I have hereunto set my hand this 10th day of June, 1929.

ROBERT N. LUPFER.

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